/*
 ============================================================================
 Page	     : 455-456
 Name        : name1.c
 Date	     : 20210407
 Author      : Hbue 18060333
 Copyright   : Your copyright notice
 Description : 使用指向结构的指针
 ============================================================================
 */

#include <stdio.h>
#include <string.h>

#define NLEN 30
struct namect
{
	char fname[NLEN];
	char lname[NLEN];
	int letters;
};

void getinfo(struct namect *);
void makeinfo(struct namect *);
void showinfo(const struct namect *);
char *s_gets(char *st, int n);

int main(void)
{
	struct namect person;

	getinfo(&person);
	makeinfo(&person);
	showinfo(&person);

	return 0;
}

void getinfo(struct namect *pst)
{
	printf("Please enter your first name.\n");
	s_gets(pst->fname, NLEN);
	printf("Please enter your last name.\n");
	s_gets(pst->lname, NLEN);
}

void makeinfo(struct namect * pst)
{
	pst->letters = strlen(pst->fname) + strlen(pst->lname);
}

void showinfo(const struct namect *pst)
{
	printf("%s %s, your name contains %d letters.\n", pst->fname, pst->lname, pst->letters);
}

char *s_gets(char *st, int n)
{
	char *ret_val = NULL;
	char *find = NULL;

	ret_val = fgets(st, n, stdin);
	if(ret_val)
	{
		find = strchr(st, '\n');		// 查找换行符
		if(find)				// 如果地址不是NULL,
		{
			*find = '\0';			// 在此处放置一个空字符
		}
		else
		{
			while(getchar() != '\n')
			{
				continue;		// 处理输入行中剩余的字符
			}
		}
	}

	return ret_val;
}

